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6 April 2017 Development of Liquid Bait With Unique Bait Station for Control of Dolichoderus thoracicus (Hymenoptera: Formicidae)
Chung-Chi Lin, Tsai-Wei Chang, Hung-Wei Chen, Chung-Han Shih, Po-Cheng Hsu
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Abstract

The Dolichoderus thoracicus (Smith) has seriously infested urban, village, and agricultural environments in Taiwan. To develop optimal bait for the effective control of D. thoracicus, we investigated the feeding preferences of this ant at different sugar and amino acid concentrations in a laboratory setting. The number of feeding workers was significantly higher for 20% sucrose compared with that for other sugars at 10% and 20% concentrations. Furthermore, among all tested concentrations of monosodium glutamate (MSG; 1%, 3%, 5%, and 10%), the highest number of ants were attracted by 1% MSG with 20% sucrose. The consumption of each bait solution was also measured, and the results were similar to those for ant number. Regarding toxicants, the toxicity and repellency of 3% boric acid and borax bait were evaluated individually. Both 3% boric acid and borax demonstrated no repellency against D. thoracicus workers. The LT50 of the 3% boric acid bait was 4.87 d, whereas that of 3% borax bait was only 1.56 d. Thus, 3% boric acid showed further delayed action, facilitating workers spreading the toxicant to their nestmates through trophallaxis. In combination with our unique bait station, we propose an optimal bait formulation comprising 20% sucrose, 1% MSG, and 3% boric acid as a promising candidate for controlling D. thoracicus.

© The Authors 2017. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For Permissions, please email: journals.permissions@oup.com
Chung-Chi Lin, Tsai-Wei Chang, Hung-Wei Chen, Chung-Han Shih, and Po-Cheng Hsu "Development of Liquid Bait With Unique Bait Station for Control of Dolichoderus thoracicus (Hymenoptera: Formicidae)," Journal of Economic Entomology 110(4), 1685-1692, (6 April 2017). https://doi.org/10.1093/jee/tox107
Received: 12 December 2016; Accepted: 20 March 2017; Published: 6 April 2017
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